Bangladesh J. Environ. Sci., Vol. 36, 15-22, 2019 @ BAED ISSN 1561-9206

WATER QUALITY MONITORING OF AQUACULTURE HATCHERY IN MYMENSINGH REGION OF BANGLADESH

M. S. Islam1*, M. H. Imran1, S. H. Rimu1, M. H. Kabir2 and Suravi3

1Dept. of Environmental Science and Resource Management, 3Institutional Quality Assurance Cell

Mawlana Bhashani Science and Technology University, Tangail-1902, Bangladesh

2EQMS Consulting Limited, Banani, Dhaka-1213, Bangladesh

*Corresponding author’s email: islammstazu@yahoo.com

ABSTRACT

The study was conducted during the period from August to November 2016 taking water samples from the fish hatchery and stocking ponds at the Shambhuganj of Mymensingh district, Bangladesh.

The samples were collected from four selected hatcheries as Deshbondhu hatchery (H-1), Maa hatchery (H-2), Janani hatchery (H-3) and Bhaibhai hatchery (H-4); and four stoking ponds as pond-1 (P-1), pond-2 (P-2), pond-3 (P-3) and pond-4 (P-4) from the same hatchery, respectively.

The result showed that temperature, pH, DO, alkalinity, NO2-, NO3- and NH3 were ranged from 22.6 to 25.9ºC, 7.8 to 8.4, 5.4 to 8.0 mg/l, 120 to 170 mg/l, 0.10 to 0.90 mg/l, 0.25 to 0.65 mg/l and 0.01 to 0.07 mg/l, respectively in hatchery water. In case of stocking ponds water, the temperature, EC, TDS, pH, DO, BOD, alkalinity, ammonia, NO2- and NO3- were ranged from 23.4 to 30ºC, 120 to 781 µS/cm, 79 to 160 mg/l, 6.0 to 8.0, 6.01 to 8.02 mg/l, 1.5 to 2.8 mg/l, 120 to 170 mg/l, 0.01 to 0.09 mg/l, 0.11 to 0.33 mg/l, 0.40 to 0.88 mg/l, respectively. The results revealed that NO3– values were 0.65, 0.68 and 0.88 mg/l in H-2, P-2, and P-4, respectively which was slightly higher than the standard level.

Moreover, NO2– (0.90 mg/l) in H-3 and BOD (2.8 mg/l) in P-2 was also found slightly higher than the standard level. The result of the study concluded that water quality of those hatcheries and stocking ponds were suitable for aquatic organisms as well as for fish culture and management.

Key words: Aquaculture, water quality, hatchery, stocking ponds.